Assertion :Homologues show a regular gradation in physical properties. Reason: Homologues possess same functional group.

Assertion and reason both are correct statements and reason is correct explanation for assertion.

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Assertion and reason both are correct statements but reason is not correct explanation for assertion.

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Assertion is correct statement but reason is wrong statement.

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Assertion is wrong statement but reason is correct statement.

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Solution

The correct option is B Assertion and reason both are correct statements but reason is not correct explanation for assertion.
Homologues show similarity in properties because they differ from each other by the same repeating unit.
As the molecular mass increases in any homologous series, a gradation in physical properties is seen. This is because the melting and boiling points increase with increasing molecular mass.
Homologues possess the same functional group and share similar chemical properties.
Therefore, both statements are correct but the reason is not the correct explanation for assertion.

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